October 2008
Intermediate to advanced
720 pages
16h 7m
English
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6.5 Domain Name Server Under Control
Two plugins are also available for testing the Domain Name Service (DNS): check_dns and check_dig. While check_dns tests whether a host name can be resolved, using the external nslookup program, check_dig allows any records at all to be queried. Both plugins are part of the standard distribution.
The situations in which they are used overlap somewhat. With check_dns, you can also explicitly query a specific DNS server, although this plugin is really for checking whether the name service is available generally.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.